In education, a teacher is a person who provides schooling for others. A teacher who facilitates education for an individual student may also be described as a personal tutor. The role of teacher is often formal and ongoing, carried out by way of occupation or profession at a school or other place of formal education. In many countries, a person who wishes to become a teacher at state-funded schools must first obtain professional qualifications or credentials from a university or college.
Description Source: wikipedia.org/wiki/Teacher
High school teachers must have a bachelor’s degree. In addition, public school teachers must have a state-issued certification or license. Most states require high school teachers to have majored in a subject area, such as chemistry or history. While majoring in a subject area, future teachers typically enroll in their higher education’s teacher preparation program and take classes in education and child psychology as well.
Most high school teachers work in either public or private schools. Some teach in public magnet and charter schools. Others teach in private religious or secular schools.